
body {
      background-image: url('../img/indexbg.png');
      background-repeat: no-repeat;
      background-size: cover;
    }
/* 按钮div样式 */
    .container {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
    }
    /* 按钮样式 */
    .btn {
      font-size: 20px;
      font-weight: bold;
      display: inline-block;
      padding: 30px;
      margin-right: 10px;
      background: #719dff;
      cursor: pointer;
      border-radius: 20px;
      width: 305px;
      height: 150px;
      color: #ffffff;
      opacity: 0.8;
    }
    /* 按钮样式 */
    .btn_red {
      font-size: 20px;
      font-weight: bold;
      display: inline-block;
      padding: 10px;
      border-radius: 20px;
      margin-right: 10px;
      background-color: #FF0000;
      cursor: pointer;
      width: 930px;
      height: 150px;
      color: #ffffff;
      opacity: 0.8;
    }
    /* 按钮样式 */
    .btn_manual {
      font-size: 20px;
      font-weight: bold;
      display: inline-block;
      padding: 10px;
      border-radius: 20px;
      margin-right: 10px;
      background: #719dff;
      cursor: pointer;
      width: 930px;
      height: 150px;
      color: #ffffff;
      opacity: 0.8;

    }
    .btn_manual:hover {
      background-color: #1E90FF;
    }
    .btn_red:hover {
      background-color: #AF0000;
    }
    .btn:hover {
      background-color: #1E90FF;
    }

    .btn-disabled {
      background-color: #f2f2f2;
      cursor: not-allowed;
      opacity: 1;
      pointer-events: none;
    }
    /*标题样式  */
    h1 {
      font-size: 50px;
      font-weight: bold;
      margin-bottom: 20px;
      text-align: center;
      color: white;
    }
    /* 按钮汉字样式 */
    h2 {
      font-size: 30px;
      font-weight: bold;
      margin-bottom: 20px;
      text-align: center;
      color: black;
    }